If biological species are defined in terms of reproductive compatibility, the formation of a new species hinges on ________.
A) gene flow
B) reproductive isolation
C) hybrid formation
D) gene pool expansion

Question

Quizplus · Accepted Answer

Reproductive isolation is the key factor that leads to the formation of a new species. When individuals from different populations or species cannot interbreed or produce viable offspring, they become reproductively isolated and can diverge genetically over time. This can happen through a variety of mechanisms, including geographical barriers, differences in mating behavior, and genetic incompatibilities. Gene flow (A), hybrid formation (C), and gene pool expansion (D) may all play a role in shaping populations, but they are not sufficient in and of themselves to create a new species.

If Biological Species Are Defined in Terms of Reproductive Compatibility